From: pdeschrijver@nvidia.com (Peter De Schrijver)
To: linux-arm-kernel@lists.infradead.org
Subject: Multi-platform, and secure-only ARM errata workarounds
Date: Mon, 4 Mar 2013 08:34:36 +0200 [thread overview]
Message-ID: <20130304063436.GB27241@tbergstrom-lnx.Nvidia.com> (raw)
In-Reply-To: <5130E757.6090500@wwwdotorg.org>
On Fri, Mar 01, 2013 at 06:37:27PM +0100, Stephen Warren wrote:
...
> Since some of the bits that enable WARs are banked per CPU, the WAR
> needs to be enabled by code running on each individual CPU, each time
> it's powered on. When a secure monitor exists, the CPU will boot through
> it (at least on Tegra, there is a single register that defines the boot
> vector for all CPUs; I don't know if that fact is ARM-architectural or
> not), so the secure monitor can apply the WAR if needed. However, when
> there is no secure monitor and the kernel runs in secure world, the
> kernel would have to apply those WARs, since the only code that runs is
> in the kernel.
>
The boot vector register is Tegra specific. At least on OMAP all cores boot
from ROM afaik.
Cheers,
Peter.
next prev parent reply other threads:[~2013-03-04 6:34 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-25 23:47 Multi-platform, and secure-only ARM errata workarounds Stephen Warren
2013-02-26 9:36 ` Marc Dietrich
2013-02-26 16:39 ` Stephen Warren
2013-02-26 22:31 ` Nicolas Pitre
2013-02-27 9:03 ` Marc Dietrich
2013-02-27 14:00 ` Rob Herring
2013-02-27 17:42 ` Stephen Warren
2013-02-28 13:58 ` Marc Dietrich
2013-02-26 10:23 ` Arnd Bergmann
2013-02-26 10:31 ` Catalin Marinas
2013-02-26 10:35 ` Catalin Marinas
2013-02-26 10:48 ` Arnd Bergmann
2013-02-26 11:11 ` Catalin Marinas
2013-02-26 11:35 ` Russell King - ARM Linux
2013-02-26 14:07 ` Rob Herring
2013-02-26 18:01 ` Stephen Warren
2013-02-26 18:11 ` Russell King - ARM Linux
2013-02-26 18:30 ` Stephen Warren
2013-02-26 18:49 ` Russell King - ARM Linux
2013-02-27 6:07 ` Santosh Shilimkar
2013-03-01 17:37 ` Stephen Warren
2013-03-01 18:05 ` Russell King - ARM Linux
2013-03-04 6:34 ` Peter De Schrijver [this message]
2013-03-04 9:16 ` Peter De Schrijver
2013-03-04 17:08 ` Stephen Warren
2013-03-05 7:40 ` Peter De Schrijver
2013-03-05 17:00 ` Stephen Warren
2013-03-06 8:14 ` Peter De Schrijver
2013-03-06 16:18 ` Stephen Warren
2013-03-10 17:25 ` Santosh Shilimkar
2013-03-10 18:47 ` Olof Johansson
2013-03-11 16:59 ` Stephen Warren
2013-03-11 18:54 ` Jason Gunthorpe
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